Burnishing machine



1943- E. w. SMITH 2,326,895

BURNISHING MACHINE Original Filed July 1, 1941 A Patented Au 17, .1943

1 1. This invention relates torburnishing, machines and is illustrated herein as embodiedin toolsupporting -'rnechanism -.,adapted; .ior-r use-in; an edge setting machine vofjthe type disclosed: in aneapic on Uni ed s atesL-ett s Retr at-.

- In machinesof -the type under consideration the, tool holder is oscillatedat a high speed about" ahorizontal axis and has apair of cylindrical openings which are inclined at'somewhatiess spindles in the cylindrical openings under pressure of the-work. It'is an object of the present invention to pro-' vide ani nproved means for limiting'the' movement of the tool carriers away from the axis of oscillation andalso for yieldably resisting said turning movement. In accordance withthis object,'a feature of the invention consists in the provision of a resilient member engageable with av flat bottom of a groove. formed in the side of e each-of the carrier spindles foryieldably resist- I ing rotation of the tool carriers fromtheir neu-'- tral positions in the openings .in the tool holders and for limiting outward movement of the car-' riers in their respective openings".v

I The various features of the invention win be: understood and appreciated from the following" e detailed description read in conjunction with the accompanying drawing, .innwhich'. Fig. l is an angular view,- partly broken away,

' of the operating head of ,the illustrative maf v a r l r 1 Y iThe'tool carrier spindles: Silaar permitted a limited amount of rotati've and axial movement in. r the holes or openings 43,which movement allows p if themto follow changes in the; curvature accord-j 7 v i'ng tothesole'edge. Inwardmovement of t he" chine; and Q 7 Fig. 2 isa verticallongitudinal'section, partly broken away, of the head of the machine.

In the-illustrative construction there is'shown a shaft 20 (Fig. 1) which is rotatablymounted 1941;. Serialj 1s licatiori Jannary States Letters Patent' No'. 2 ,190,810;'granted Felb'a" nair-ie -offLi E.Topham. Slidalolylj and rotatably,

- IIiOLlIll?(31Fillthe Shaft 2511 ??SIJilidIeZQFWhiCh projectsrearwardly from :a'holde'r 26 the'hold er 1 jbeingurgedin a direction indicated byreference iuery 1940;" onfa rel QB lengthvHse' or the 1 axis as ofithe; snare V, co paratively large head 34' 1having e pair ef op'posit'ely disposed notche M ig;- int/men ction that causes {1 5 the holde'r ztto' moV' i-n"uhison withthe oscile '1' lating' shaft 2'8. The .rernainderof the driving 7 connectionis formedby a pairof lugs38 of the v '{holder'vvhich a'refheld in the notches te -by the action of =the.springBLLAttached' to and; pforin-' "g0 ing part of the head 342 are a'pair of oppositely. inclined arcuate plates 401which-eXtendoblique1y to the directioneof oscillation of. the shaft 2 0, the

I Theholderlfi has a pair of bosses 46'ea'ch H having a cylindrical opening or hole 48 shaped I V and arranged to receive a. spindle 50 of a tool carrier 52. .Thecarri'erspindles 50 are slidably and rotatably mountedin the cylindrical .openings .48 and are therefore capable of rotary movement about and "translatory .movement the plate 62.

hich'is'rnountedin cylindrical V I The eeemeaeg-share- 2a isprovided wit {a V plates being so located that their ends form the 1 .side walls of the notches 36.1 The plates 40 are attached to the head 34- b'y screws 42 and form i runways down which the lugs 38 ride when'the tools areshifted 180"about theaxis upon.

' thrusting a hand 'lever' 44 rearwardly through mechanism which. is describedflin said Letters I:

30 Patent No. 2,283,239.

in a bearing 22 and is oscillated or'vibrated back spindlesresulting from the ,pressure ofithe work I and forth at a high rate of speed by driving. is resisted by balls 6 8 carried'rby the inner ends orspnngs 1o, the-bins being located beyond the V I inner ends of the tool carrier spindles 50 and being v,urgedin an outward direction by the springs.

Rotation of the tool ca'rrier spindles 50 is re- 7 1 sisted'byv the lower ends of a pair of depending arms or flanges 12 which extend from a light plate 141 of spring material and engage the flat surfaces 54 formed on the spindles; I Theflanges 12 also engage shoulders 15 on the spindles 50 at the'inner ends of thefiat surfaces 54'to'limit out-' ward movement of the spindles under th influence of; the springs 10. The plate'14 extends 1 transversely to the arms I2 andis lpmvidedat its opposite ends with openings which-fitaround the'r ends of posts l6,. .which also serve as mounting means for the springs. By'rusin g-the light plate 14 of springmaterial an d locating it;ceiitrallyf* of the head of the tool holder 26, the relatively heavy eccentric spring-pressed latches, which have heretofore been used yieldingly torests't rotatiojn of-the tool carriers and spindles, havebeen "eliminated, thereby reducing the inertia of the "tool holder andtheyibrations caused bye-the fre quent reversals in the direction of its motion.

'iHaving described my invention; Iwhat I claim asznew and desire tosecure by Letters-Patent of cthegUnited-states is: I, W s s g 1; In a burnishing machine, an oscillating-'- holder comprising ga -head having toolreceiving recesses therein, tool carriers ,sl-idably and rotatably mounted in said recesses'and a resilient member located centrally of said'holder head and arranged resilientlyto resist rotation of the tool carriers in said recesses and to limitaxial movement thereof insaidreoesses; I

holder having a head provided with oppositely disposed jtool receiving recesses, tool carriers which are slidablyjand rotatably mounted in'said recesses and having flat surfaces, and a resilient member located centrally of the tool holder head,

said member-having a pair or depending arms ar- 7 and to resist rotation and axial movement thereof insaidholes-f .1 I 4 In afbmiishing machihe, aldl iven oscillatory head a plmality ef tool cafriers'each connected t-o saici head fort-ranslatory movement along and rotary movement-about a'nfaxis and each having a substantially hat-surface terminating at a shouidenanda light plate of spring material secured centrally tO said head afrrd having' flanges ienga'geable with; 'said'flat surfaces to resistv said rotary mOVemEnt oIZthe carriers and withflsaid 'shouldersi to translator'y movement of the carriers.

,2. In a burnishing machine, an oscillating tool ranged to engage thefiat surfaces on the carriers EDWIN W. 

